提出了一种基于微光学阵列差分真时延网络的光学多波束合成系统,研究了该系统中结构参数与波束形成性能的关系。通过改进基于微光学阵列差分真时延网络的参数,优化了差分真时延网络的初相位以及幅相一致性;通过改进天线单元的参数结构,优化了各个天线单元的方向图,解决了合成波束时容易出现栅瓣及波束较宽的问题。所提系统可抑制栅瓣,得到的旁瓣消光比大于10dB,频率为3.8GHz时的3dB带宽为35°,频率为4.9GHz时3dB带宽为29°,指向误差小于1.5°,频率覆盖范围为2~6GHz。该系统在光学相控阵雷达中具有广阔的应用前景。 An optical multibeam synthesis system based on micro-optical array differential real time delay network is proposed. The relationship between structural parameters and beamforming performance is studied. By improving the parameters of differential real time delay network based on micro-optical array, the initial phase and phase consistency of differential real-time delay network are optimized. By improving the parameter structure of antenna unit, the directional pattern of each antenna unit is optimized, Beam prone to grating lobes and beam wide issues. The proposed system can suppress the grating lobe, and the obtained sidelobe extinction ratio is more than 10dB, the 3dB bandwidth is 35 ° when the frequency is 3.8GHz, the 3dB bandwidth is 29 ° when the frequency is 4.9GHz, the pointing error is less than 1.5 ° and the frequency coverage is 2 ~ 6GHz. The system has broad application prospects in optical phased array radar.